Bài tập 1.49 trang 40 SBT Toán 11

A. [-2;6]                      

B. [-4;4]

C. [-4;6]                      

D. [-1;6]

A. 6                            

B. 8

C. 10                           

D. 12

A. \(\mathbb{R}\backslash \left\{ {\dfrac{\pi }{2} + k\pi } \right\},k \in \mathbb{Z}\)

B. \(\mathbb{R}\backslash \left\{ {k2\pi } \right\},k \in \mathbb{Z}\)

C. \(\mathbb{R}\backslash \left\{ {k\dfrac{\pi }{2}} \right\},k \in \mathbb{Z}\)

D. \(\mathbb{R}\backslash \left\{ {k\pi } \right\},k \in \mathbb{Z}\)

A. 8                            

B. 6

C. 10                           

D. 14